resourceType_txtF_mv:"Teaching Media"topic_facet:"k-9"gradeLevel_txtF_mv:"K"gradeLevel_txtF_mv:"10"gradeLevel_txtF_mv:"11"ngssPE_txtF_mv:"5-ESS2-1"ngssPE_txtF_mv:"2-ESS2-1"publisher_txtF_mv:"Geological Society of London (GSL)"ngssCC_txtF_mv:"Cause and effect: Mechanism and explanation"ngssCC_txtF_mv:"Systems and system models"